Android SAX解析XML

SAX是一種占用內存少且解析速度快的解析器，它采用的是事件啟動。官方推薦使用

以下是通過網上 獲取的天氣xml文件

1. <?xml version="1.0" encoding="UTF-8"?>
2. <!-- published at 2011-12-14 14:55:05 -->
3. <Profiles>
4. <Weather>
5. <city>廣州</city>
6. <status1>多雲</status1>
7. <status2>陰</status2>
8. <figure1>duoyun</figure1>
9. <figure2>yin</figure2>
10. <direction1>無持續風向</direction1>
11. <direction2>無持續風向</direction2>
12. <power1>≤3</power1>
13. <power2>≤3</power2>
14. <temperature1>20</temperature1>
15. <temperature2>12</temperature2>
16. <ssd>0</ssd>
17. <tgd1>21</tgd1>
18. <tgd2>21</tgd2>
19. <zwx>2</zwx>
20. <ktk>5</ktk>
21. <pollution>3</pollution>
22. <xcz>4</xcz>
23. <zho />
24. <diy />
25. <fas />
26. <chy>4</chy>
27. <zho_shuoming>暫無</zho_shuoming>
28. <diy_shuoming>暫無</diy_shuoming>
29. <fas_shuoming>暫無</fas_shuoming>
30. <chy_shuoming>套裝、夾衣、風衣、夾克衫、西服套裝、馬甲襯衫配長褲</chy_shuoming>
31. <pollution_l>一般</pollution_l>
32. <zwx_l>弱</zwx_l>
33. <ssd_l>舒適</ssd_l>
34. <fas_l>暫無</fas_l>
35. <zho_l>暫無</zho_l>
36. <chy_l>夾衣類</chy_l>
37. <ktk_l>比較適宜(制熱)</ktk_l>
38. <xcz_l>不太適宜</xcz_l>
39. <diy_l>暫無</diy_l>
40. <pollution_s>對空氣污染物擴散無明顯影響</pollution_s>
41. <zwx_s>紫外線弱</zwx_s>
42. <ssd_s>適宜在自然環境及露天場所活動。</ssd_s>
43. <ktk_s>比較適宜開啟空調</ktk_s>
44. <xcz_s>洗車後未來1-2天內有降水、大風或沙塵天氣，或洗車當日氣溫太低容易結冰。不太適宜洗車。</xcz_s>
45. <gm>1</gm>
46. <gm_l>低發期</gm_l>
47. <gm_s>天氣舒適，不易發生感冒；</gm_s>
48. <yd>2</yd>
49. <yd_l>比較適宜</yd_l>
50. <yd_s>雖然天空雲層較厚，比較適宜戶外運動；</yd_s>
51. <savedate_weather>2011-12-14</savedate_weather>
52. <savedate_life>2011-12-14</savedate_life>
53. <savedate_zhishu>2011-12-14</savedate_zhishu>
54. </Weather>
55. </Profiles>

解析類：繼承DefaultHandler類

1. package wu.lis.action;
3. import org.xml.sax.Attributes;
4. import org.xml.sax.SAXException;
5. import org.xml.sax.helpers.DefaultHandler;
7. import wu.lis.model.Weather;
8. import wu.lis.util.Constant;
10. public class WeatherHandler extends DefaultHandler {
11. private Weather weather;
12. private String preTag = null;// 作用是記錄解析時的上一個節點名稱
14. @Override
15. public void startDocument() throws SAXException {
16. weather = new Weather();
17. System.out.println("startDocument");
18. }
20. @Override
21. public void startElement(String uri, String localName, String qName,
22. Attributes attributes) throws SAXException {
23. preTag = qName;
24. System.out.println(preTag);
25. }
27. @Override
28. public void characters(char[] ch, int start, int length)
29. throws SAXException {
30. String result = new String(ch, start, length);
32. if (preTag.equals(Constant.City)) {
33. if (weather.getCity() == null)
34. weather.setCity(result);
35. }
36. if (preTag.equals(Constant.Status1)) {
37. if (weather.getStatus1() == null)
38. weather.setStatus1(result);
39. }
40. if (preTag.equals(Constant.Status2)) {
41. if (weather.getStatus2() == null)
42. weather.setStatus2(result);
43. }
44. if (preTag.equals(Constant.Figure1)) {
45. if (weather.getFigure1() == null)
46. weather.setFigure1(result);
47. }
48. if (preTag.equals(Constant.Figure2)) {
49. if (weather.getFigure2() == null)
50. weather.setFigure2(result);
51. }
53. if (preTag.equals(Constant.Direction1)) {
54. if (weather.getDirection1() == null)
55. weather.setDirection1(result);
56. }
57. if (preTag.equals(Constant.Direction2)) {
58. if (weather.getDirection2() == null)
59. weather.setDirection2(result);
60. }
62. if (preTag.equals(Constant.Power1)) {
63. if (weather.getPower1() == null)
64. weather.setPower1(result);
65. }
66. if (preTag.equals(Constant.Power2)) {
67. if (weather.getPower2() == null)
68. weather.setPower2(result);
69. }
71. if (preTag.equals(Constant.Temperature1)) {
72. System.out.println(preTag);
73. if (weather.getTemperature1() == null)
74. weather.setTemperature1(result);
75. }
76. if (preTag.equals(Constant.Temperature2)) {
77. if (weather.getTemperature2() == null)
78. weather.setTemperature2(result);
79. }
81. if (preTag.equals(Constant.Ssd)) {
82. if (weather.getSsd() == null)
83. weather.setSsd(result);
84. }
85. if (preTag.equals(Constant.Ssd_l)) {
86. if (weather.getSsd_l() == null)
87. weather.setSsd_l(result);
88. }
89. if (preTag.equals(Constant.Ssd_s)) {
90. if (weather.getSsd_s() == null)
91. weather.setSsd_s(result);
92. }
94. if (preTag.equals(Constant.Tgd1)) {
95. if (weather.getTgd1() == null)
96. weather.setTgd1(result);
97. }
98. if (preTag.equals(Constant.Tgd2)) {
99. if (weather.getTgd2() == null)
100. weather.setTgd2(result);
101. }
103. if (preTag.equals(Constant.Zwx)) {
104. if (weather.getZwx() == null)
105. weather.setZwx(result);
106. }
107. if (preTag.equals(Constant.Zwx_l)) {
108. if (weather.getZwx_l() == null)
109. weather.setZwx_l(result);
110. }
111. if (preTag.equals(Constant.Zwx_s)) {
112. if (weather.getZwx_s() == null)
113. weather.setZwx_s(result);
114. }
116. if (preTag.equals(Constant.Ktk)) {
117. if (weather.getKtk() == null)
118. weather.setKtk(result);
119. }
120. if (preTag.equals(Constant.Ktk_l)) {
121. if (weather.getKtk_l() == null)
122. weather.setKtk_l(result);
123. }
124. if (preTag.equals(Constant.Ktk_s)) {
125. if (weather.getKtk_s() == null)
126. weather.setKtk_s(result);
127. }
129. if (preTag.equals(Constant.Pollution))
130. if (weather.getPollution() == null)
131. weather.setPollution(result);
132. if (preTag.equals(Constant.Pollution_l))
133. if (weather.getPollution_l() == null)
134. weather.setPollution_l(result);
135. if (preTag.equals(Constant.Pollution_s))
136. if (weather.getPollution_s() == null)
137. weather.setPollution_s(result);
139. if (preTag.equals(Constant.Xcz))
140. if (weather.getXcz() == null)
141. weather.setXcz(result);
142. if (preTag.equals(Constant.Xcz_l))
143. if (weather.getXcz_l() == null)
144. weather.setXcz_l(result);
145. if (preTag.equals(Constant.Xcz_s))
146. if (weather.getXcz_s() == null)
147. weather.setXcz_s(result);
149. if (preTag.equals(Constant.Chy))
150. if (weather.getChy() == null)
151. weather.setChy(result);
152. if (preTag.equals(Constant.Chy_l))
153. if (weather.getChy_l() == null)
154. weather.setChy_l(result);
155. if (preTag.equals(Constant.Chy_shuoming))
156. if (weather.getChy_shuoming() == null)
157. weather.setChy_shuoming(result);
159. if (preTag.equals(Constant.Gm))
160. if (weather.getGm() == null)
161. weather.setGm(result);
162. if (preTag.equals(Constant.Gm_l))
163. if (weather.getGm_l() == null)
164. weather.setGm_l(result);
165. if (preTag.equals(Constant.Gm_s))
166. if (weather.getGm_s() == null)
167. weather.setGm_s(result);
169. if (preTag.equals(Constant.Yd))
170. if (weather.getYd() == null)
171. weather.setYd(result);
172. if (preTag.equals(Constant.Yd_l))
173. if (weather.getYd_l() == null)
174. weather.setYd_l(result);
175. if (preTag.equals(Constant.Yd_s))
176. if (weather.getYd_s() == null)
177. weather.setYd_s(result);
179. if (preTag.equals(Constant.Savedate_weather))
180. if (weather.getSavedate_weather() == null)
181. weather.setSavedate_weather(result);
182. if (preTag.equals(Constant.Savedate_life))
183. if (weather.getSavedate_life() == null)
184. weather.setSavedate_life(result);
185. if (preTag.equals(Constant.Savedate_zhishu))
186. if (weather.getSavedate_zhishu() == null)
187. weather.setSavedate_zhishu(result);
188. }
190. @Override
191. public void endElement(String uri, String localName, String qName)
192. throws SAXException {
193. if (qName.equals("Profiles")) {
194. preTag = null;
195. }
196. }
198. @Override
199. public void endDocument() throws SAXException {
200. super.endDocument();
201. System.out.println("城市：" + weather.getCity());
202. System.out.println("白天：" + weather.getStatus1());
203. System.out.println("夜間：" + weather.getStatus2());
204. System.out.println("白天風向:"+weather.getDirection1());
205. System.out.println("夜間風向:"+weather.getDirection2());
206. System.out.println("白天溫度：" + weather.getTemperature1());
207. System.out.println("夜間溫度：" + weather.getTemperature2());
208. }
209. }

調用解析

1. InputStream inStream = getClass().getClassLoader().getResourceAsStream("weather.xml");
2. System.out.println(result);
3. SAXParserFactory factory = SAXParserFactory.newInstance();
4. try {
5. SAXParser parser = factory.newSAXParser();
6. XMLReader reader = parser.getXMLReader();
7. reader.setContentHandler(new WeatherHandler());
8. reader.parse(new InputSource(inStream));
9. } catch (Exception e) {
10. e.printStackTrace();
11. }